[Cartell]

i would to see if there a OTA vendor themes? like the tmobile zen one?

[Perfect Storm]

I don't think anyone has made them available.
Modifying the blackberry.alx isn't that hard to get them loaded on. Th instructions, and downloadable alx files are in the ringtones section.

[bosozoku]

Wirelessly posted (BlackBerry8800/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)

I tried to do it on my pc doesn't work

[Perfect Storm]

You'll have to be more specific. What didn't work? What did you try?