You can install Joomla 1.0.x modules from its administrator's panel, Installers --> Modules option. Upload the module's archive file using the Browse button.

Once installed you can activate the module from the Modules --> Site Modules section. You can also find installation instructions which should be included in the module package.

If you have problems installing Joomla modules yourself, ask your host for assistance. SiteGround provides the best Joomla hosting and such requests are handled with ease.