Renders(PNG) CS3 Issue

[Skyve]

Everytime I want to open a render(PNG) I get this error ;

"Could not complete your request because the file-format module cannot parse the file"

I'v searched around Google and many persons have this problem,but none seems to have a clear solution. One of the solution I keep hearing about is resetting Photoshop to default settings by pressing Ctrl+Shift+Alt while Photoshop is opening.Sadly that didn't work

The renders I'v been trying to open all came from planetrenders.net , weird thing is that there's one Render I can actually open,a Naruto one I took from this SRF thread;
viewtopic.php?f=11&t=118962

Makes me wonder why did that Naruto render work but not the other ones

I really hope someone knows the solution. I really suck at making my own renders

EDIT: WTF, just got some Renders from GFXresource.com and they work Guess planetrenders.net is the problem?
EDIT2: Well I guess my problem kinda got solved,so I'll ask another question because I can All the renders I download are freaking huge,how the hell am I suppose to find them in a "normal sized" signature :banghead:
EDIT3: Can anyone link me the "+" shaped brush? 8)
-Ex

P.S: Using CS3 Extended

[Kraq]

Haha, I guess you should disregard my pm.

You can goto Image>Image Size to down size it to your liking.

[Skyve]

Haha, I guess you should disregard my pm.

You can goto Image>Image Size to down size it to your liking.

Yeah sorry,sent the PM before even searching around