hi andrei,
the idea is within taggedfrog you can set applications to open specific filetypes. example, your using taggedfrog portably, you have an .html that you like to view in firefox, but the computer your using doesn't have firefox installed, luckily, you have portable firefox with you and you set it to associate with .html files, when you open the .html, portable firefox will be called instead the default internet browser of the computer you are using.
additional information
1 - sample (reference picture q-dir)
http://www.softwareok.com/?seite=Freewa … tion_rules
2 - sample (reference q-dir faq)
http://www.softwareok.com/?seite=faq-Q-DIR&faq=51
3 - sample (reference xyplorer tip)
These associations between filename patterns and applications are private to XYplorer and portable. They are completely independent of the system wide file associations stored in the registry.
Syntax:
pattern(s)>application
Examples with simple extension patterns:
png>C:\Programs\Viewer\Viewer.exe
png;jpg>C:\Programs\Viewer\Viewer.exe [more than one pattern, separated by ;]
png>..\Viewer\Viewer.exe [relative to this XYplorer's path]
png>?:\Programs\Viewer\Viewer.exe [? is set to drive where this XYplorer is running from]
txt>%windir%\notepad.exe [environment variables allowed]
txt>notepad [registered applications need base name only]
Examples with other patterns:
readme.txt>readmeview.exe [load readme.txt files with readmeview.exe]
?:\*.pdf>?:\Programs\pdfview.exe [load PDF files on app drive with a viewer on app drive]
You can as well enter a script that will be triggered on opening a file:
*.exe>::copytext <curver> [copies the version number of a dbl-clicked executable]
4 - sample (reference xyplorer 7.10)
check Portable Openwith Menu
http://www.xyplorer.com/release_7.10.htm
http://www.xyplorer.com/tour/index.php?page=pom
check out the information, 
thanks
