you can convert the file from geotiff using erdas into image and safe it as image or use arc gis and export the geotiff and save it as enf format

Dear Tomasz,

What I would understand from your question is, you want to publish map sheets for other people (on internet).

If it is so, look for Geoserver or mapserver.

(PS: if this is your answer, please let me know, we shall have some discussion)

thanks