when ever i start my ftb up, it runs perfictaly fine, the logo appers, forge dose its startup thingy, and then, its just a black screan, broken
Yes, lemme just check here from my magicbook of wellbeing what might cause it... Hmm... Yes...
It seems like one way to possibly fix this is by copying your console log to pastebin.com and giving us the link to that paste.
OR
You can try moving your FTB somewhere that's not in your downloads/desktop (for example, move your FTB launcher to c:/ftb), then start the launcher, go to options tab, change the path to c:/ftb, exit the launcher and restart the launcher.
Please follow these steps exactly: http://desk.feed-the-beast.com/index.php?/Knowledgebase/Article/View/9/0/basic-troubleshooting
This is to rule out any issues with your client setup.
is it worth mentiniong i use windows XP