Using Drago as a study tool
Yesterday evening, I had used Drago to study two of the reviews from GTL while in bed and trying to shake-off my insomnia. I've found it to be an excellent tool for printing out diagrams of the games at specified moves along with commentary. Not sure if there's an even better tool out there. It should be included in your study arsenal.
Shown above is a print preview of my last game with arikuun (BC). It'll be nice to print these to Adobe PDFs.
Drago is not as sophisticated or full-featured as those from the SmartGo program family. But then again, Drago is freeware compared to SmartGo's $59. Drago is more than enough for double-digit kyuus.
Helpful Suggestion for WinXP Users
WinXP can be configured to open all SGF files using Drago. When My Documents is open, select Tools > Folder Options and set all SGF files to be opened by Drago.
After this set-up, you should be able to click on any of the SGF-linked images on websites like Gobase, Sensei's Library and the American Go Association (like their weekly Go problem) and it will open in Drago as an interactive goban where you can make moves, replay the sequences, view commentary and examine variations.