OptikVerve Labs also offers Virtual Studio, which allows you to play with your photos without opening your editing program.
According to the company's website, their programs are "compatible with Photoshop® CS3 and older, Photoshop® Elements, Paint Shop™ Pro®, Photo-Paint and other popular imaging applications." At this point, it's a Windows-only program, but according to the website, they are looking into making a Mac-compatible version.
The company has installation instructions on their website...I have been able to install the program in PSE 5.0, PSE 7.0, and CS3 with no problems. In my program, I find VP under the 'filter' tab. Just open a copy of the photo you want to work on, navigate to VP, and click to open.
You might also want to open several copies of the same photo, try a different filter on each copy, and then layer them over each other. By adjusting the opacity and the blend mode of the upper layers, you can create a variety of looks.
I created the photo on this layout using the Reminiscing filter atop the original color copy, and then lowering the opacity just a touch. The supplies are all from Sunday Afternoon.