NO Dought in my Mind - Use it as an OS + program drive. If you find that You do Not need the full 240 gig, then partition it and create a "D" drive for a "working" partition and as you work on a given photo, or video file just copy it here. With that size of SSD I do not think SRT would benifit you that much.
As to Installation:
1) Check to see if Your HDD was set to AHCI when you installed windows. If it was great, if it was set to IDE mode change to aqhci. Must first make a registry Change which is simple. reboot, chang bios to ahci. walla done.
2) Disconnect HDD, Connect SSD, power on go to Bios and verify AHCI is enabled. and install your windows 7 on SSD.
3.) when Done, power down, reconnect HSS, power on go to Bios and set Boot order to SSD.
For the beauty of this, You can NOW daul boot to either drive. Simply hit the key that brings up boot Menu (ie on My gigabye MB it is F12, On my Asrock it is F11. NOTE this does NOT change Bios Boot priority.
When Happy, no problems (ie after 2 -> 4 weeks) then you can blow win 7 off of the HDD.