Is there some way to make this sword, that you get in SI in very begining, be leveled somehow? I get it on 1-2lvl and now I'am near 26th. There is a lot of cheats, but now I'm playin' on xbox, so can I upgrade it to better version or i can just get rid of it?

The only way to "re-level" it on the Xbox would be to delete SI, load and save your character, then re-download SI and start it again.

too bad for me

Why? It's free to re-download it.

Unless of course, you don't have a reliable internet connection to your xbox or you don't have Disk 2 from the GOTY version anymore, then I can see you having a problem.

:(