When installing Pro/E don't install the FLEXlm licensing server
A nodelocked license will be used instead.
Take note of your host ID. It might be your MAC address, or it
might be a shortened hostid, depending on your platform.

Edit the baselicense.dat file, replacing 00-00-00-00-00-00 by
your host ID. You can also find it by installing first Pro/E
then running the bundled CPU_ID utility.
However, the installer creates some bundled scripts where 
features are hardcoded, so if you don't know your CPU_ID/HOSTID
you might need to install Pro/E first to get this information,
then install it again with a proper license.

For example, a SunOS install will show a 4 bytes hostid:
22-88-11-00, rather than 6. HostID given for illustration purposes.
Once the host ID is replaced, run ptc.exe under WINE or other
emulation tool with the following arguments:

    wine ptc.exe -i baselicense.dat -o license.dat -verfmt 6.1

Now you can install Pro/E. When asked for a license.dat, point to
this file, or copy/paste its content in the license editor.
Set an environment variable pointing to it:

    export LM_LICENSE_FILE=/usr/local/ptc/proe20/flexlm/license.dat

For example.