can any1 plz help me out ?? (3300)

i got my nokia 7650 replaced by nokia 3300. its good, but da problem is i got all da games n applications in .SIS n .JAR format .... n when i send those files to my fone n try to install it, i get an error which says "unsupported file format" or somethin like dat. n da default images in da fone r in .JPG n .GIF format, but when i try to send some other (like my own) pictures which r in da same format i.e. .JPG n .GIF, it again shows da same error .... can any1 temme wat formats files shud i use for applications, games n images ??
thanx in advance ....
till then,
cheerss ...
-Rakshit