Don't worry about resizing them. host them at Photobucket.com. All you have to do is create an account and then upload them to there. Then you can post them here. Once you have them uploaded click on the picture that you want to post and them right click it, copy the location and paste it using the image option on your post. If you would like you can post a link to your photobucket folder but, before you do that you need to set a read only password in your account options for your folder. Then post the link on your message with the read only password, like this.
http://smg.photobucket.com/albums/v487/bayoubengal/
Password is bigbuck

I hope this helps