Good day!
I am certified network engineer MTCTCE/MTCNA having over 10 years of experience in configuring, maintaining and troubleshooting of enterprise network devices (including Cisco Catalyst switches).
I can update IOS and configure Your Cisco Catalyst 3750 switches qualitatively, because I maintenance a network with many Cisco switches and I periodically update IOS on them.
Where are You located?
As I know, only Atlantic islands have this time zone (UTC-2).