Quake 4 : Stuck in the MCC landing site.. HELP!!

Please help me. I'm stuck in the MCC landing site, i'm unable to find a way to open that door, I couldn't get past those boxes kept at the other entrance...
Please help...

jump at the boxes, try to reach the roof of that door, u will find a hole in the ceiling, which is made due to a rocket blast, u need to jump inside that, kill a few stroggs, & open the door from inside

Thanks gxsaurav. i'll try that..

[Nemesis]

If in the future, you get stuck on any game, you should try the following website:

GameFAQs

It's one of the best online resources to find game cheats, hints, walkthroughs, guides, etc. It's all there!

alright Nemesis.. Thank you..