Anyone know about Video Editing?

[oasis]

does anyone know anything about video editing?
prefferably in adobe premier pro cs3

I have a movie that we recorded for school and a video cam corder.
the guy who owned the cam corder said that the video was 1080p (not the issue)
the video camera has a native file type of .mts

I used avs video converter to convert the .mts to a .mov quicktime file so I could import it into adobe premier.

after I converted the .mts is lumped all my video clips into 1 file about 400 MB.

I dont know if that file size is to big for premier or what but I am having some serious lag issues.

the video does not play back in real time. it does not even play back in choppy time very well. mostly I am working of audio only because the video does not play very well.

even selecting differnt menus like file or project or clip has about a 3 second lag.

I have no idea what is wrong. but the only thing I can think of is that I messed up on the file conversion or something.

my computre has a
Intel core 2 quad core CPU Q8300 @ 2.50GHz

8.00 GIG (Ram)
64 bit operating system on windows 7

I dont know how to check which video card I have but I am pretty sure it is a Nvida

Anyone know anything or have any ideas?

ps. I tried doing a disk cleanup on my hard drive and a defragmentation. both did not help at all =D

---------- Post added at 04:57 AM ---------- Previous post was at 04:53 AM ----------

I just did a side test of a seperate converted file.

I took a 400 MB .mts file and converted it by itselft to a .mov file and it compressed it to 30 MB

I loaded that into premeir in a new project and that 30 MB file still lags the system with unworkable situations.