I have noticed people have been having many problems on eLoader for 2.6 and here are a few tips:

- If it doesn't work the first time it doesn't mean it doesn't work.
- Waiting a few seconds and overclocking often helps
- Battery charge increases probability of booting
- Sometime pressing some buttons helps an Eboot load
- Taking the battery out and running psp from wall outlet helps
- If the hombrew comes with multiple eboots try all different ones
- Formatting the memory stick helps.
- YES eLoader is the ONLY way to boot hombrew on 2.01+
- Some eboots "half work"

I hope this helps you use your Eboots.