I don't have experience of that particular model, Acer Aspire 9410, but "ease of install" depends on whether the space is available through one of the user accessible ports on the base of the unit.
The battery, memory and disc covers sometimes allow access to other components. Typically the memory cover exposes both the RAM and the wirless LAN module.
If the space for the module is not visible through one of these ports then the laptop would need to be opened up, which will invalidate your warranty. In this instance, a third-party USB Bluetooth dongle may be more appropriate.
Providing all the connectors are there, installing a bluebooth model is no more difficult than installing RAM or a wireless card.