Encapsulated plugin installer timeout

[Shop Suey]

Adjust the PHP execution time at your webhosting to sth. like 240.

[pilou2]

Adjust the PHP execution time at your webhosting to sth. like 240.

Thanks for your answer.
Actually, my php.ini setting

max_execution_time

is already set to 240. But thanks to your answer I realized this can be set in PHP scripts by function

set_time_limit()

too and and found out there is a function

zen_set_time_limit()

in Zen Cart and although Zen Cart has a default setting of 60s that we can set in admin menu

Configuration->MyStore->Admin Set max_execution_time for processes

.
Increasing this setting to 120 did the trick.
I will add this in plugin installer and plugin documentation.

Thanks!