Here you go:
1. Install
Irfanview (click on that link, then click on the "download" link, and download the version for windows)
2. Open the screenshot in your \screenshots folder in Irfanview, and then go to "File" --> "Save" and save it as a .JPG in a new folder on your desktop called "Screenies" or something.
3. Open said Photobucket / image site and browse to the folder we made in Step 2.
4. Upload, post link, DONE!
BAMBQ!!!
Regards,
_________________
"Come under the flag of truce, and brook no treason... for mineself is Death, and care not whom knows mine touch."
- Frey Asaid'De Majere