Problem with flashing new WM

[4bigfoot]

Hi,
i have O2 Exec,
flashed this version of WM6
Jwrightmcps Crossbow ROM Update 2.12.06 WWE
http://forum.xda-developers.com/showthread.php?t=343736

it works ok, but doesn't see my 8Gb SDHC card (actually i see only 3,8GB)

I tried to flash another roms, but my uni is not booting after install. Only this one (Jwrightmcps Crossbow ROM Update 2.12.06 WWE) is working. When i try to boot my phone O2 logo is displaying and thats it.

Question: is it enough to download and install new rom, or i need to install somethink else? I tried also to install 6.1 rom, but it doesnt boot my phone also.
If i need to install somethink else, can you add link also :)
Thanks for help.

[4bigfoot]

I have one idea what i did wrong.
When i flashed new rom i started it ehat windows was launched (not from bootloader). Is it possible that this way i break my radio and after that my new rom won't start?
i looked wiki, but i didn't get answer :(

[4bigfoot]

Thank you for not anwering :(

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