first of all an upgrade to an UNoffical rom is easy all the tutorials are stickied on top of the appropriate forum...
the link to the wm6 kitchen..
http://forum.ppcgeeks.com/showthread.php?t=11074
the link to the wm6 rom....
http://forum.ppcgeeks.com/showthread.php?t=7671
the kitchen has a read me file with all the info you need...please read that first before posting any question since it has probably more than you need...
Whats the difference between the kitchen and the rom your probably asking...
well the kitchen allows you to pick the programs you want built into your wm6 rom
the rom is just that a premade but very good rom made by helmi_c
and finally for your tv question...I just heard of this site today. I scanned for a little while and it look pretty cool I think its a feed of live tv..channels are kinda limited but it works right. Its blue-mobile.com