If you have the file in JPG format, there are a number of jpeg compressor programs that can be found on the internet. Some are free, but I use Advance Jpeg Compressor from:
I believe it was around $30 and it works great. I use Photoshop CS2 also, but still use the compressor program when doing a batch of files.
If you just have one file that you're trying to compress and want to email it to me and have me compress and email it back, let me know and I'd be glad to do that for you.
Oh and WELCOME TO THE FORUM!