i am looking for a modified version of TREE.COM (msdos 6.22) that enables it to work under ALL versions of DOS. this has been done with edlin but finding one for tree.com is difficult. thanks in advance.

Use setver in order to run any version of tree.

Using SETVER on the system to set that systems return value for TREE.COM to 6.22 is one solution. Passing around copies of DOS over the internet upsets Micro$ofs lawyers and violates their copyrights. But if you have a legal copy of DOS 6.22, then you can make your own custom version of the TREE.COM command. Patch it with DEBUG. Copy a copy of TREE.COM to the root or a temp directory and do a CD to it. Then: debug tree.com -E 1600 -????:1600 75.90 03.90 -W -Q should do the trick. Problem is, the 6.22 version of tree.com uses INT 2F functions that do not exist in versions of DOS prior to v5.0, so this patched version might not work on them. For them you would have to have an old version of tree.com patched to bypass the version check.

thanks JackG. it worked perfectly! do you have any more modifications?

Thanks again Jack, that's cool stuff. Skip