Just finished messing around and setting up mbrola myself
Not really that complicated but I did it with the help of Midnight Commander and dont know the console command from top of my head.
(mostly copied from page 62 in this thread)

I´ll assume espeak is already working so the next step is getting mbrola.
http://tcts.fpms.ac.be/synthesis/mbr...nux/mbrola.rar
extract it from the rar, and move it in to /usr/bin
I used mc for this and set permissions from the menu to executable by everyone (mc started as root)

then you still need a voice file
http://tcts.fpms.ac.be/synthesis/
I downloaded the us1 zip and unzipped it to MyDocs

next is copying the actual voice file to /opt/espeak/data/mbrola/
in this case the file is: us1

now it should work in espeak
test with : espeak -v mb-us1 "Hello world"

if that works you´ll only have to change the voice option in Modrana
voice parameters to manual
and voice string to
espeak -v mb-us1 -p60 -s120 -a %volume% -m %message%