Before Forge became the absolute standard, many players installed mods by editing the minecraft.jar file directly.
If you don't want to mess with game files, a texture pack is the easiest route. How To install X-ray mod 1.5.2 Download minecraft 1.5.2 xray
a reputable 1.5.2 X-ray mod (e.g., Uyjulian's X-ray Mod ). Open your .minecraft/bin folder. Before Forge became the absolute standard, many players
Often used for a "Redstone Finder" to locate wire paths or hidden mechanisms. Before Forge became the absolute standard