I like my FTP program to open right in my catalog images since this is what I use the most. You can set your FTP to open this way.
Log into your FTP program.
For Filezilla: Log on, then click on File, click on Site manager, click on advanced tab. Then under Default Remote Directory type in:
/home/ put in your ftp user name here/public_html/catalog/images
click OK and your all set for the next time you log on.
For other FTP programs you should be abe to find the Default Remote Directory under file-site manager-tools and just type in the same as above.