umm i got a kinda big map ( 63 kb ) and it wont upload:
There is a problem with the file you are attempting to upload.


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Filename inf_landing.PMS File names must use only valid characters
Extension .pms Certain file extensions are not accepted
Size 62.33 KB File sizes must be reasonable

so my question is kinda obvius... what am i supposed to do

Just ZIP the file.

http://www.ultimatezip.com/index.php
that's a freeware ZIP tool, dunno if it's any good.
You could just use Winzip (http://www.winzip.com/) instead, which is shareware afaik.

how do i do with the screens ( same problem )

Make them .jpg instead. No problem then.