Another little step in the right direction has been done. Windows programs icons are now resized to a 50x50 pixel square while being imported by the automatic script. I now have to do the same for the usual, manual scripts (hbadd). Isn't this much better?
By the way, while importing icons I encountered a little obstacle: many Windows programs come in different versions along with their names, distinguished by a string included between parenthesis - for instance "CrystalDiskMark 7 (32bit)". Well, AROS shell isn't really happy about them, because a command like
rename "CrystalDiskMark 7 (32bit).png" "CrystalDiskMark 7 (32bit).info"
would NOT work. So I edited my version of create_hostapp for Windows in order to cut off unsupported parenthesis in AROS script names. Windows program CrystalDiskMark 7 (32bit) will appear on HostBridge as CrystalDiskMark 7 32bit.