I'm experiencing a similar problem:
ERROR: save_biff failed to close AREA7200/AR7208.TIS during tiles 3
Stopping installation because of error.
ERROR Installing [Baldur's Gate Trilogy - Core], rolling back to previous state
Will uninstall 4226 files for [SETUP-BGT.TP2] component 0.
ERROR: error copying [bgt/backup/0/BMINSC.dlg]
ERROR: error copying [bgt/backup/0/MINSCJ.dlg]
ERROR: error copying [bgt/backup/0/MINSCP.dlg]
ERROR: error copying [bgt/backup/0/EDWINJ.dlg]
ERROR: error copying [bgt/backup/0/EDWINP.dlg]
ERROR: error copying [bgt/backup/0/BEDWIN.dlg]
Uninstalled 4226 files for [SETUP-BGT.TP2] component 0.
area7200\ar7208.tis - The process cannot access the file because it is being used by another process.
ERROR: Unix.Unix_error(3, "close", "")
PLEASE post the file SETUP-BGT.DEBUG to http://forums.spellh...p?showforum=261
Automatically Skipping [Baldur's Gate Trilogy - Core] because of error.
Using Language [English]
[./dialog.tlk] created, 111136 string entries
NOT INSTALLED DUE TO ERRORS Baldur's Gate Trilogy - Core
---------------------------------------------------
Uninstallation complete. Please restore dialog.tlk
---------------------------------------------------
C:\BWP\BGii - SOA>
ERROR: save_biff failed to close AREA7200/AR7208.TIS during tiles 3
ERROR: error copying [bgt/backup/0/BMINSC.dlg]
ERROR: error copying [bgt/backup/0/MINSCJ.dlg]
ERROR: error copying [bgt/backup/0/MINSCP.dlg]
ERROR: error copying [bgt/backup/0/EDWINJ.dlg]
ERROR: error copying [bgt/backup/0/EDWINP.dlg]
ERROR: error copying [bgt/backup/0/BEDWIN.dlg]
ERROR: Unix.Unix_error(3, "close", "")
Baldur's Gate Trilogy - Core (Baldur's Gate Trilogy) was not installed due to errors.
Without this component the installation cannot be continued.
You can try to repair the problem and install the component again afterwards. In this case please select "retry" after the repair.
If you don't want to spend time on that now, you can also exit the program.
Enter [r]etry or [e]xit.