Adobe Photoshop fillmstrip (.FLM file format) helper

Adobe Photoshop has a file format known as "filmstrip" or .FLM. It is basically one large file made up of individually numbered (I use 720 x 486 pixel) frames (could be hundreds or thousands) from a video that was exported from their companion video editing program, Adobe Premiere. The problem is moving around within this FLM file is rather difficult since you need to continually tap the arrow keys to go left to right and up and down. If you hit the wrong key you will often completely lose your place and cannot find the frame you were editing. I'm looking for a program that will work within Photoshop (Version 6 for PC) to allow me to go from one frame to the next with a single key stroke so I can quickly jump back and forth to compare frames and not lose my place in the file. It must also center the frame up on my screen or keep it centered once I do so. Also, there are time code numbers for each frame. I'd like a way to type in a specific number and have it find that frame for me. Anything else you can add will be appreciated. Since I have idea how much work is involved here I will leave that up to you to tell me what's fair. I would need to own the final product/code. Here are some links to sites that will give you some FLM file format details for coding help.