The procedure is as follows:
1. Open the site of any search engine you like.
2. On the opened page in the search window (where the text is entered for the search) we do a tap with a hold.
3. In the context menu that appears, select "Add search engine" (Add search server).

1. Flash VKontakte - not supported (only music is available, the video does not lose.)
2. smooth zoom - not supported
3. additional settings - opera: config in the address field
4. transfer of bookmarks (other settings) from previous versions of Opera - if the previous Opera is installed on the device, the bookmarks will pick up automatically when installing the 10th version.
(If this does not happen, then the transfer of bookmarks can be done only through the online service Opera Link using BB.)
Bookmarks themselves are saved in Program Files \ Opera Mobile 10 \ profile \ datastorage. Save datastorage, make backup bookmarks.
5. excess traffic (including for local resources, or saved pages) - try to disable the "turbo" mode
6. Cookies / passwords, etc. are not saved. on some sites - try disabling turbo mode
7. Some sites are not displayed - try to disable the "turbo" mode
8. Does the turbo mode compress traffic well? - worse than Opera Mini.
9. Is it possible to install this version of Opera in addition to other Operas - it is possible, only the main thing to decide which browser will be "by default"
10. how to open saved pages and other html files -Opera Mobile 10 beta (Post # 3784122)
11. If you set the 10-ku "not by default", but now you want to make the "default", but do not want to reinstall -Opera Mobile 10 beta (Post # 3624731)
12. How to disable the cursor when scrolling with the joystick ?? nothing yet.
13. How to assign a quick jump to the beginning or end of the page in the opera ini? no such opportunity. But, if the opera is in the disabled full screen mode, then a toolbar appears at the bottom, and a red cap on top. If you tap on it, then the current page quickly goes to the beginning. those. The quick transition function is partially implemented.

Q: How to change the list of domains offered to auto-fill after dialing a dot?
A: Opera automatically suggests filling in 3 standard domains: com, org, net, as well as a list of user domains stored in the profile \ datastorage \ 4 \ userTLDs.dat file. To edit the file, use the hex editor, since The file format is binary. The format of the stored data is as follows:
1 byte: 00
2 bytes: the length of the payload in bytes (by default 17h = 23 for a Russian-speaking build)
3+ bytes: list of domains, comma separated.
In the source file, in addition to the usual domains, some garbage is clogged: "200.132". As an example, a file that removes all domains except .ru:http://rapidshare.com/files/351364747/userTLDs.dat
In release 10, it is possible to configure this parameter throughopera: config.

Question : How can I make web sites define this Internet browser as a desktop Internet Explorer, not Opera mobile browser?
Answer : You must enter in the address entry line Opera: config like url and press enter


Two links describe the settings in opera: config: (for BB but may be of interest.)
http://www.opera.com/support/usingopera/operaini/
http://www.myopera.net/students/opera_config.php



To disable the auto-rotate screen, you need to rename or delete the registry branch HKLM / SOFTWARE / OPERA / GSENSOR / IdleTime

Opera Mobile 10 beta 3

when installed over the 2nd beta, bookmarks are lost (including on the start page), the story is saved. Options for saving bookmarks:

• Pre-synchronization using Opera link service
  
• Pre-saving, with subsequent replacement, the file with bookmarks from the 2nd beta (... \ profile \ Datastorage \ 2 \ all.dat)
  
• when installing "just so", picks up the bookmarks, if installed 9.5 / 9.7 -not personally verified.
  
  

Changes with respect to beta 2
Pros:
increased speed
plugin support added:

• Flash (at the level of Opera Mobile 9.5 and 9.7, i.e. not for all sites, requiring the installation of appropriate libraries, for example, using:fixOperaFlash )
  
• Wmp
  

smoother scrolling (according to those who had jerks on 2-ke)
auto-rotate to landscape works (maybe not at all) - (was there such a 2-ke I do not know!)

Minuses:
works less stable (hangs the program itself)
sometimes more noticeable leaks of RAM
sometimes affects the operation of other programs (possibly related to the previous item)
in some cases it is not possible to close open tabs
localization at the moment (13 \ 02 \ 2010) no

Addition:
Replacing the default search engine from Yandex to google (for 1.2 and 3 beta versions)
Opera Mobile 10 beta (Post # 3960058) (when replacing possible loss of bookmarks - not personally verified
Link to the post about scripts for the opera:
Opera Mobile 10 beta (Post # 3648293)